The week in TV: Metro-land; Great British Railway Journeys; Mr Selfridge; World Without End; Silent Witness - video review

Andrew Collins marvels at John Betjeman's 1973 exploration of surburbia and trains in Metro-land on BBC4; compares Michael Portillo's efforts of BBC2's Great British Railway Journeys; watches Jeremy Piven as Mr Selfridge on ITV1; sees Cynthia Nixon and hears clunky dialogue in 14th century drama World Without End on Channel 4; and the 16th series of BBC1 crime thriller Silent Witness, starring Emilia Fox